6 ideas
18812 | Split out the logical vocabulary, make an assignment to the rest. It's logical if premises and conclusion match [Tarski, by Rumfitt] |
13344 | X follows from sentences K iff every model of K also models X [Tarski] |
13343 | A 'model' is a sequence of objects which satisfies a complete set of sentential functions [Tarski] |
490 | Everything happens by reason and necessity [Leucippus] |
7319 | If we give up synonymy, we have to give up significance, meaning and sense [Grice/Strawson] |
13345 | Sentences are 'analytical' if every sequence of objects models them [Tarski] |